I'm in the military and have moved a ton of times, frequently overseas and back. A couple words of advice:
-check with the movers before wrapping/packaging your cabinet. Most require that they wrap anything that they are covering with their insurance (and follows Le Chuck and get a company with FRV).
-identify it on your moving inventory as a name brand item not as a generic cabinet and make sure to list it as a high value item (frequently a separate sheet from the inventory). I have always built my own high end gaming PCs but I always listed them as the comparable Alienware rig on the inventory sheet. When it came time to claim any damages, you get the value of the item listed.
-have them unpack at your destination and then plug it in before they leave. If it doesn't work annotate on your inventory sheet. DO not wait until they have left to find out it doesn't work.
-do not leave them alone with your stuff. Most are honest but some are not. Stealing happens during moves, watch them like a hawk.
-if you are hiring movers they are a mixed bag. Some are great, some are not. Do not hesitate to stop them if they are doing something wrong with your stuff.
-have drinks for them (cokes and water NOT beer) and if they are packing your whole place out over a whole day, buy them lunch. You would be amazed at how a small gesture like this will pay off with most people.
-treat them with respect but remember you are hiring them for a job. They should do it to your standard not theirs.
-do not worry about a flight of stairs with respects to the movers. Part of their job.
-do worry about the stairs to ensure you measure your new place before you move. We moved to a place once that was built in the 1950s and the stairs were too narrow with a bend halfway up that our queen size box spring would not fit up. Ensure your cabinet can make it up the stairs size wise before you move.
Hope these help. Good luck